node provider

Most dApps rely on a node provider rather than running a full node in-house.大多数去中心化应用（dApps）依赖节点服务商，而不是在本地运行完整节点。

Centralised node providers like Infura and Alchemy are single points of failure that power much of Ethereum's infrastructure.像 Infura 和 Alchemy 这样的中心化节点服务商是单点故障隐患，它们支撑了以太坊的大部分基础设施。